Loom.



S. S. JACKSON.

LOOM.

PPPPPPPPPPPPPPPPPPPPPPPPP 0. 1,052,417. Patented Feb. 4, 1913.

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SIIVIEON SCI-ICON JACKSON, OF READVILLE, MASSACHUSETTS, ASSIGNQR, TO THE STAFFORD COMPANY, OF READVILLE, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

LOOM.

Specification of Letters Patent.

Patented Feb. 4,1913.

To all whom it may concern:

Be it known that I, SIMEoN SOHOON JACK- SON, a subject of Great Britain, residing at Readville, in the county of Norfolk, State of Massachusetts, have invented a certain new and useful Improvement in Looms, of which the following is a specification, reference being had therein to the accompanying drawm s.

The invention is designed more particularly for employment in the weaving of webs in flattened tubular form for pillowcases, bags, etc., but is also useful in the weaving of webs or fabrics of other kinds 1n the case of which it becomes necessary for certain of the shed-formations, to liftinto the upper part of the shed in the warps a number of the warp-threads considerably greater than the number caused to occupy the bottom plane of the shed. At the t1me of such shed formations the uplifting tendency transmitted through the threads raised into the upper part of the shed, to the newlywoven cloth extending rearward from the breast-beam to the fell, being greater than the opposite tendency transmitted through the threads in the bottom plane of the shed, the cloth at and adjacent the fell, and the warps extending rearward from the fell in the bottom plane of the shed, are raised somewhat. In being thus raised, the warpthreads of the said bottom plane are uplifted from the shuttle-race of the lay, so that the shuttle in its flight across the loom, instead of traveling upon the surface of the lay-beam, is elevated by such warp-threads slightly above such surface. This is objectionable, and it is the aim of my invent-ion to prevent the cloth and the warp-threads 0f the bottom plane of the shed from being thus raised or elevated.

The invention consists in the hold-down device which I will now describe, acting upon the web adjacent the fell and between the temples of the loom.

The invention, in the best form of embodiment thus far contrived by me, is shown in the drawings, in which latter,

Figure 1 shows the said embodiment applied in connection with certain of the parts of a loom, in section in a vertical plane paralleling the side-frames of the loom. Fig. 2 is a plan.

I will explain the use of the invention in a loom equipped and operating to produce tubular pillow-case or bag-fabric in flattened form, and having four harness-frames, as 8., 8 8 8 It is known that for certain shedformations the said harness-frames are moved three up and one down, and for others one up and three down. Fig. 1 shows, for instance, a shed-formation for which harness-frames S, 8 and 8 are up, and 8 is down. There being in the case of a shed in which three harness-frames are up and one down three times as many warpthreads drawn upward into the upper part of the shed as occupy the bottom plane thereof, the upward strain transmitted through the uplifted threads considerably exceed that transmitted through the threads of the bottom plane. The resulting tendency is, as already mentioned, to lift the woven web at and adjacent the fell, and the warp-threads of the said bottom plane, so as to elevate the warp-threads last mentioned above the upper surface of the laybeam 3 (of the lay l) so as to raise the shuttle 7, in its flight across the loom, ofi such surface.

To prevent the lifting of a preponderating number of the warp-threads into the upper part of a given shed from causing the cloth at and adjacent the fell, and the warp-threads of the bottom plane of the shed, from being elevated as explained, I provide the holding-down rod or bar 12. The acting portion of this rod or bar bears upon the upper surface of the web between the temples ll, 11, and close to the fell. Such acting portion preferably extends across the greater part of the width of the web, from a point near one temple to a point near the opposite temple. The temples are of the ordinary roller-temple class, and hold the web at its selvages, keeping the latter from rising, while the rod or bar 12 controls the portion of the web which is intermediate the temples. The rod or bar 12 is supported in place by having its outwardly-projecting side-arms 121, 121, received within sockets of stands 13, 13, which are applied to the opposite end-portions of the breast-beam 2. The said sidearms are held fast within the said sockets by means of the clamp-screws 14. 14, which are provided in connection with the sockets. The rod or bar 12 is bent so that the intermediate acting portion thereof projects to the rear, into position to bear upon the top surface of the woven web at the place above described. The side-arms are capable of turning Within the sockets of stands 13, 13, after clamp-screws 14, 14, have been loosened. This provides for vertical adjustment of the acting portion of the rod or (bar, by permitting such portion to be swung downward or upward, as may be required for the purpose of placing at the required height, so asto hold the web at the proper height to secure the desired results in operation, and the rod or bar may then be fixed in the position thus given to it by tightening up the clamp-screws. The rod or bar may be adjusted transversely of the loom, the side-arms 121, 121, being capable of sliding lengthwise within the sockets of stands or brackets 13, 13.

What is claimed as the invention is,

1. In a loom weaving flattened tubular web and raising at timesa preponderating proportion of warp-threads into the upper part of the shed, the combination with the harness-frames rising in preponderating number for certain sheds and the lay, of the hold-down bar which presses upon the top surface of the woven web closely adjacent the fell, preventing the bottom plane of the shed from being lifted away from the shuttle-race of the lay, supports for the said bar and means for setting the said bar higher or lower as required.

2. In a loom, in combination, the harness-frames, the lay, the temples controlling the selvage-portions of the web, and the independently-adjustable hold-down bar acting upon the top surface of the web between the said temples and preventing the bottom plane of the shed from being lifted away from the shuttle-race of the lay.

3. In a loom, in combination, the harnessframes, the lay, the temples, and the holddown bar adjustable vertically independently of the temples and acting upon the top surface of the web and preventing the bottom plane of the shed from being lifted. by the upward strain of the open shed away from the shuttle-race of the lay.

at. In a loom, in combination, the harnessframes, the lay, the temples, the hold-down bar acting upon the top surface of the web be tween the temples and preventing the bottom plane of the shed from being lifted by the upward strain of the open shed away from the shuttle-race of the lay and means for adjusting the said bar transversely to vary the portion of the web upon which it bears.

5. In a loom, in combination, the harnessframes, the lay, a hold-down bar acting upon the top surface of the web adjacent the fell, supports for the said bar located at the opposite ends thereof on which it is adapted to be swung to set its working portion in a higher or lower working position.

6. In a loom, in combination, the harnessframes, the lay, temples at opposite sides of the loom, engaging and holding down the selvage-portions of the web, a hold-down bar acting upon the top surface of the web adjacent the fell between the temples and holding the web from lifting between the temples, and supports for the said bar located at the opposite ends thereof, the intermediate portion of the bar being cranked to project back from the said supports in between the temples.

7 In a loom, in combination, the harness- 1 frames, the lay, temples at opposite sides of the loom engaging and holding down the selvage-portions of the web, a hold-down bar acting upon the top surface of the web adjacent the fell between the temples and 1 holding the web from lifting between the temples, and elevated supports for the said bar located at the opposite ends thereof, the intermediate portion of the bar being cranked to project back from the said sup- 7 ports and downward in between the tem ples.

In testimony whereof I affix my signa ture in presence of two witnesses.

SIMEON SOHOON JACKSON.

Witnesses:

CHAS. F. RANDALL, NATHAN B. DAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

